Ubuntu ( (listen)) is a free and open-source Linux distribution based on Debian. Ubuntu is officially released in three editions: Desktop, Server, and Core (for IoT devices and robots).

Ubuntu releases are made semiannually by Canonical Ltd, the developers of the Ubuntu operating system, using the year and month of the release as a version number.

Ubisoft Entertainment SA (; French: [ybisɔft]; formerly Ubi Soft Entertainment SA) is a French video game company headquartered in Montreuil, France, with several development studios across the world.

UBS Group AG is a Swiss multinational investment bank and financial services company founded and based in Switzerland.

UB40 are an English reggae and pop band, formed in December 1978 in Birmingham, England. The band has had more than 50 singles in the UK Singles Chart, and has also achieved considerable international success.

Ubiquitin is a small (8.6 kDa) regulatory protein found in most tissues of eukaryotic organisms, i.e. it occurs ubiquitously.

Ubba (probably died 878) was a ninth-century Viking, and one of the commanders of the Great Army that invaded Anglo-Saxon England in the 860s.

Princess Ubol Ratana (Thai: อุบลรัตน; RTGS: Ubonrat; Thai pronunciation: [ʔù.bōn.rát]; born 5 April 1951 in Lausanne, Switzerland) is a member of the Thai royal family.